Help a brother out
HGH builds are popular, though many consider OP and think it should be nerfed. Basically grenades + HGH might stacking with elixers.
Static discharge is another popular build. You mainly want SD, rifle turret, toolkit, then another thing and you use the SD and toolbelt skills to do some pretty good burst damage.
Bunker builds are pretty easy to think up on your own.
Other than that, there aren’t many. You can play whatever you want, though it may not be the best.